Ventilating window lock



9, 9 Q D. JOKUBAlTlS 1,870,332

VENTILATING WINDOW LOCK Filed July 23, 1931 A ilor ney Patented Aug. 9,1932 PATENT OFFlt'IE DAMIAN JOKUBAI'IIS, OF DETROIT, MICHIGANVENTILATING WINDOW LOCK Application filed July 23,

My invention relates to a ventilating lock for windows shown in theaccompanying drawing and more particularly described in the followingspecification and claims.

The primary object of the present invention is to provide a. simple,inexpensive device which may be readily attached to the sash frames of awindow to limit the degree to which the upper and lower sash may berespectively raised or lowered for ventilation purposes, and whendetermined thereby, the sash cannot be opened to any greater extent byanyone outside the building. The construction of the ventilating lockhowever is such that the sash frames may be readily released from thecontrol of said device, inside the building, to permit raising orlowering the window frames to any desired range within the limits of thewindow casing.

With the foregoing and other objects in View which will appear as thedescription proceeds, the invention further resides in the combinationand arrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes may be made inthe precise embodiment of the invention herein disclosed withoutdeparting from the spirit of the same.

In the drawing accompanying this speci fication:

Figure 1 is a fragmentary perspective view of an upper and lower sashframe with the locking device attached thereto,the sash frames being inclosed relation.

Figure 2 is a fragmentary front elevation of a window showing the sashframes fitted with a locking device at each side of the window,

Figure 3 is a fragmentary perspective view of a modification of thelocking device.

Figure 4 is a cross-sectional view through the abutting rails of anupper and lower sash frame showing the locking device installed, butreleased to permit the unrestricted adjustment of one sash in relationto the other.

Figure 5 is a fragmentary perspective view of a modification showing avariation in the means employed for securing the device to the upperhorizontal rail of the lower sash.

1931. Serial No. 552,621.

Referring now to the letters of reference placed upon the drawings:

A denotes a window casing, B indicates the upper sash frame and B thelower horizontal member of the upper sash frame. 0 denotes the lowersash frame and C the upper horizontal member of the lower sash frame.

D indicates a strip of sheet metal screwed to the side rails of theupper sash frame. The strips are constructed with a plurality ofratchet-faced steps D spaced apart and struck up from the body of themetal, thereby providing a plurality of aligned abutments to receive thethrust of a swinging latch E, pivoted upon a pintle F supported inbearings formed in a leaf G, screwed to the horizontal rail C of thelower sash.

It will be seen that the sash frames may be adjusted in relation to eachother to provide for ventilation above the upper sash and below thelower sash. Upon inclining the swinging latch E of the lower sash so itmay rest upon the strip D attached to the upper sash, any attempt toraise the lower sash from the outside will result in the swinging latchE contacting with the next or adjacent abutment D of the strip Dattached to the side rails of the upper sash, thereby limiting thefurther opening of the window.

If on the other hand an attempt is made to lower the upper sash, theabutment D directly above the swinging latch E will engage the swinginglatch and thus arrest the movement of the upper sash downwardly upon thelower sash reaching the limit of its downward movement through contactwith the window casing.

The respective sashes may be adjusted in relation to the window openingby manually tilting the swinging latch away from the ratchet bar, thenraising or lowering the sash in relation to each other to the extentdesired for ventilation, the latches are then tilted toward the ratchetbars, whereupon further opening of the windows from the outside isrestricted.

in the modification shown in Figures 3, a and 5, the swinging latch E ispivoted to a U-shaped plate H overlapping the side of the upper rail ofthe lower sash.

A channel-like member I is formed with one of its side walls I ofrelatively greater depth that it may bear upon the underside of the sashrail (see Figure 4) while the other wall I rests upon the inwardlyprojected flange of the U-shaped plate H.

J is a bolt extending through the member I and the flange of theU-shaped plate, fitted with a nut K, and upon adjusting the bolt in thenut, the edge of the wall I of the memher I, is caused to impinge uponthe upper Wooden rail of the lower sash, thereby securing the device tothe sash.

To further secure the device against accidental shifting, a screw K mayextend through the plate into the sash, as shown in Figure 4 ;or theplate H may be punched to form a securing brad L, shown in themodification in Figure 5.

Having thus described my invention, what I claim is:

1. In a device of the character described, a U-shaped element adapted toembrace the horizontal rail of a slidable sash frame; a swinging latchmember pivoted to the U- shaped element adapted to be tilted into thepath of an adjacent slidable sash frame; a. relatively short channelmember having one Of its Walls of greater depth than the other, thewalls of said channel member bearing respectively upon the horizontalrail of the first named sash frame and one of the flanges of theU-shaped element; and a bolt fitted with a nut extending through saidchannel member and one of the flanges of the U- shaped element, wherebyupon adjusting the bolt in the nut, the U-shaped element is forced togrip the rail of the sash frame.

2. In a device of the character described, a U-shaped element adapted toembrace the horizontal rail of a slidable sash frame; a swinging latchmember pivoted to the U- shaped element, adapted to be tilted into thepath of a plurality of abutments carried by the frame of an adjacentcooperating slidable sash frame; a relatively short channel memberhaving one of its walls of greater depth than the other, the walls ofsaid channel member bearing respectively upon the horizontal rail of thefirst named sash and one of the flanges of the U-shaped element; a boltfitted with a nut extending through said channel member and one of theflanges of the U-shaped element, whereby upon adjusting the bolt in thenut, the U-shaped element is forced to grip the rail of the sash frame;and suitable fastening means extending from the upper flange of theU-shaped element into the sash rail to secure the device againstaccidental release.

3. A device of the character described, comprising a U-shaped elementadapted to embrace the horizontal rail of a lower vertically slidablesash frame; a swinging latch member pivoted to the U-shaped elementadopted to be tilted into the path of spaced abutments carried by anupper vertically slidable sash frame; a relatively short channel memberhaving one of its walls of ater depth than the other, the walls of saichannel member bearing respectively upon the horizontal rail of thelower sash frame and the lower flange of the U-shaped element; a boltfitted with a nut extending through said channel member and the lowerflange of the U-shaped element, whereby upon adjusting the bolt in thenut, the U-shaped element is forced to grip said horizontal rail of thesash frame; and a fastening screw extending from the upper flange of theU -shaped element into the horizontal sash rail to secure the deviceagainst accidental release.

In testimony whereof, I sign this specification.

DAMIAN JOKUBAITIS. V

